# Applying kirchoff's current law on transistor considering it a single

by Phyman1109
Tags: applying, current, kirchoff, single, transistor
 P: 14 How can I apply kcl on transistor considering it as a single node since transistor can act as source or sink for electrons due to combination with holes
 P: 512 Well current in = current out ... always....... A Transistor is NOT a source or sink for electrons - at the Junction holes ( + charge ) combine with electrons (- Charge) and the ratio is 1:1 - always.... so net current is charge moving in a single direction. Consider Holes + charge moving ---> (left to right) to the junction compared with Electrons moving <---- to the junction ( right to left ) ... the net current ( think charge x direction) is all moving the same direction.
 P: 14 Oh...thanks.

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